Biosynthesis of cytokinins by tobacco cell cultures |
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Authors: | Nishinari, Noriko Syono, Kunihiko |
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Affiliation: | Department of Pure and Applied Sciences, College of General Education, University of Tokyo Komaba, Meguro-ku, Tokyo 153, Japan |
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Abstract: | In synchronously cultured tobacco cells (Nicotiana tabacum cv.Xanthi), the incorporation of U-14C-adenosine into butanol-solublecytokinins in vivo was studied. The radioactivity was incorporatedinto zeatin, ribosylzeatin, isopentenyladenosine and glucosylzeatinafter 20 min. The radioactive cytokinins were identified bythin-layer chromatography and high performance liquid chromatography.From the short time course of the incorporation of 14C-adenosineinto butanol-soluble cytokinins, the presence of the followingbiosynthetic pathway in vivo was suggested: adenosine is converedinto isopentenyladenosine and then into zeatin via ribosylzeatin.The biosynthetic pathway of free cytokinins in vivo is comparedwith that in vitro. (Received June 20, 1980; ) |
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